Tuesday, July 19, 2016

How to prepare Water Kefir


Kefir is a very good probiotic and is rich in enzymes, Vitamin B. Unlike yougurt its benefits last for more than one day.

Prerequisites

  1. A glass bottle (size of fruit jam bottle) preferable with plastic lid.
  2. Filter similar to tea filter, but of plastic.
  3. Plastic or wooden spoon. Never bring Kefir grains or Kefir liquid in direct contact with metal utinsils.
  4. Good quality white sugar (preferably with no preservatives)
  5. Either good quality brown sugar, Jaggery, organic molasses
  6. Baking Soda. It is not baking powder. It is also called Eating Soda in India.
  7. A lemon

Preparation

Once you obtain the grains, place them in a glass jar with two tablespoons
of sugar. Add water until it is about 2-3 inches above the grains and store in
the fridge overnight. There is a lot of flexibility with how you prepare water
kefir, but the basic steps are as follows.

Step 1

Fill a glass jar with water, leaving a couple inches of headspace at the top.
For every 2-3 cups of water add a tablespoon of grains and a tablespoon or
two of sugar. You can use white sugar, brown sugar, molasses, etc.

Step 2

Stir with a wooden spoon until sugar is dissolved. If you want to add fruit at
this point, go ahead. You can also squeeze some lemon juice in.

Step 3

Cover the jar with a paper towel, or light cloth, so the mixture can breathe,
and store in a cool, dark place, like a cupboard for 7-12 hours depending on
room temperature and how strong you want it. On a hot summer day it
may be ready in as little as 7-8 hours.


How to consume it

After fermenting the Kefir grains with suagr and water solution for about 7-12 hours you can filter the liquid from grains. This liquid you can directly drink or can make non hot beverages such as lemonade by mixing lemon juice or some other fruit juice. You can store this liquid in fridge for 24 hours or a bit more.

When you are taking this drink for first time, start with less quantity like 1 or 2 spoons and then gradually increase in take.

While preparing for first time using starter culture, do not consume the finished liquid for first 3 to 4 days. Simply throw it and start next fermentation cycle by adding fresh sugar and water to the grains.


Precautions and Troubleshooting

  1. Never expose Kefir grains or fermented solutions to heat, it will kill the Kefir.
  2. During fermentation never keep the bottle directly exposed to sun light. 
  3. During or after fermentation if Kefir liquid or grains color changes to blue or green then there could have been contamination during preparation so you need to discard whole batch i.e. liquid along with grains.
  4. If you see any molds in the bottle then you have to discard whole batch.


Tips

  1. Even after 10-12 hours of fermentation if your water kefir still tastes sugary then you can let it ferment for few more hours based on your local temperature. Kefir ferments slowly in cool temperature; moreover it should not be exposed to very hot temperatures also like summers, may be in such cases you can keep it in AC room.

FAQ

Second Fermentation & Flavoring

Tuesday, July 12, 2016

FAQ on Water Kefir

1. What is the temperature to ferment the water kefir?

Answer: 25 Centigrade

2. With how many spoons of Kefir grains to start the first fermentation?
3. How many cups of water to be mixed with first Kefir fermentation batch?
4. How many spoons of sugar has to be added to first Kefir fermentation batch?

Answer: Two table spoons of Kefir grains to be mixed with 2 cups of water and 2 to 3 spoons of sugar. Need to dissolve entire sugar in to water using wooden spoon as metal kills the Kefir grains. 

5. How long to ferment
Answer: 10-12 hours
While starting with starter kit, for first 3-4 days give them fresh water and sugar for every 10-12 hours, so for every 10-12 hours drain the old liquid and add fresh water and sugar.

6. How long I can use the fermented Kefir drink?
Answer: 
Once the drink is ready, if you leave it for too long, it will become too pungent;
as soon as you find the taste to be palatable, consume it within 24 hours or less.

7. Once fermented Kefir liquid is ready, what to do with fresh grains after draining the Kefir liquid.

Answer: 
You can either freeze the extra grains without water and sugar
or
You can keep them in fridge in sugar, water solution and keep changing it every 5 to 6 days.

8. What type of water has to be used

Answer: Non chlorinated water has to be used

9. Should I have to ferment Kefir right after receiving the starter kit grains?

Answer: Yes, so that Kefir grains will adjust to the new environment.

10. Can I take few weeks break?
Answer
Yes, simply put the Kefir grains in white sugar and water solution and close the bottle lid tightly and keep it in fridge. You can leave it for up to 3 weeks.

11. How to restart after break?

12. When I can have the Kefir drink?
Answer: Any time of the day 

More on Kefir here

13. How to ferment Kefir in summer season
Answer: Refer this article 

Friday, June 17, 2016

Software trends - what to expect in near future!

Twenty years back there was nothing like blogging, online News, online Search; at the most there were few computer games, few programs useful to common people such as word processor, spreadsheet etc.

As predictive analytics is strengthening in its accuracy and efficiency, mostly people should be consuming curated content based on their likes, preferences and demands. And this kind of services will become common.

Let us take generic search application, you want list of govt jobs whose prerequisite is experienced individuals even from private industry. This kind of search is currently not easily available. You have to look for web sites providing this data from the lot many of search results you got based on keyword search.

Similarly News or article suggestion engine which gets you feed based on your interests and preferences. There are few websites which already does this but there is no one stop solution which does all of this. Similarly food, restaurent, travel etc recommendations. 

It's basically like your assistant, that gets you done things you would be liking, it may be called avatar-bot which automates several steps to make it one step for you. At present this kind of technology is not there and above mentioned requirements fulfillment may involve several steps but once this kind of innovation is brought in then it will be like Jini sitting in a click!

Friday, May 6, 2016

Notes on Docker

In a Docker installation on Linux, your machine is both the localhost and the Docker host. In networking, localhost means your computer. The Docker host is the machine on which the containers run.

Container runs the selected OS image.


Quick Start:


  1. Download and Install Docker toolbox
  2. Make sure Virtual box is installed, it is included in Docker Toolbox
  3. For troubleshooting: http://stackoverflow.com/questions/33725779/failed-to-open-create-the-internal-network-vagrant-on-windows10
  4. Follow below steps to Create a new Docker VM


set PATH=%PATH%;"C:\Program Files\Git\bin"


docker-machine create --driver virtualbox my-default


Setting Proxy on Windows

Method-1

In Docker Toolbox install folder identify start.sh file and include following lines

#export HTTP_PROXY=http://example.com:80

#export HTTPS_PROXY=https://example.com:80
Close and open Docker Quickstart Terminal.

Method-2

  1. Connect to Docker machine
  2. Connect 
    • docker-machine ssh default
  3. sudo vi /var/lib/boot2docker/profile
    • HTTP_PROXY=http://example.com:80
    • HTTPS_PROXY=https://example.com:80
  4. Restart the docker-machine

Starting Kitematic using proxy


for /f %%i in ('docker-machine.exe ip default') do set DOCKER_HOST=%%i

SET NO_PROXY=%DOCKER_HOST%

set DOCKER_HOST=tcp://%DOCKER_HOST%:2376
cd Kitematic
Kitematic.exe

Saving and Loading images to and from file system

Saving sample:
docker export - saves a container's running or paused instance to a file

docker save - saves a non-running container image to a file
docker save -o <save image tar file> <image name>

Loading sample:
docker load -i <path to image tar file>

Docker Commit (Save Changes Locally):
sudo docker commit container_id image_name : commit changes made to a local docker container to save any changes made locally.

Thursday, May 5, 2016

Smart Accelerator

This idea is about automobiles with wrong accelerator press detection and collision prevention technology.

This leverages radar sensor's on the vehicle which provides the distance between your vehicle and vehicle's in front of you. Based on your current speed if you mistakenly pressed accelerator instead of break then based on above described acquired details it is trivial for the system to identify whether it is a wrong accelerator press. If it is a wrong press then it will be curtailed from being applied really on the vehicle and prevents a dangerous accident. 

Sky Eye - Eye in the Sky

Source: www.freedesignfile.com
Here I am talking about new technology idea which helps police and other security personal in chasing and pursuing the suspects who are trying to escape in fast moving vehicles.

Let us take a scenario where in a police officer is trying to chase and catch fast moving car which jumped the traffic checkpoint without going through the check. Let us assume there is lot of traffic on the road and police car is unable to overtake the offender car and is gradually losing it.

Now this police officer can switch on the sky eye and mark the fast moving car, from here on the sky eye also starts tracking the offender with much more speed than the offenders speed and relay the movements, coordinates and video to the pursuing police officer. 

Sky eye is an expert system running on police force's servers, it heavily leverages advanced GPS capabilities to track the vehicle direction, speed and vehicle identification marks such as color, make, model, registration number etc. It uses machine learning techniques to remember the pursuing vehicle and differentiate it from other surrounding vehicles and identify it. GPS would be feeding the video of the circular area for the given coordinates & radius provided by and to the Sky Eye. Sky Eye would estimate the next possible circular area where the vehicle would be present in the next time period based on the last scanned speed of vehicle, this coordinates are given to GPS to get the video and vehicle is identified from the video and this process continues until vehicle stops. All these identified vehicle trace coordinates and video's are relayed to ground force in real time for pursue.

This automated system could be used in unmanned check posts to track the offending vehicle and report to the nearest police station with all the trace details.

Thursday, February 11, 2016

Database 101 FAQ


  1. To get Oracle DB size in GB's:

    select sum(bytes/1024/1024/1024) from dba_data_files;
  2. Pagination in Oracle

    select * from ( select rownum rnum, a.* from (YOUR_QUERY) a where rownum <= :M ) where rnum >= :N;
  3. continued